Draft fan



March 2 1926.

J. E. WILLOUGHBY DRAFT m Filed March 16, 1925 manlcc James E.Wfl/ouy/zby.

I'llllll Patented Mar. 2, 1926.

PATENT oFFicE;

JAMES E. WILLOUGHBY, OF KELLOGG, IDAHO.

DRAFT FAN.

Application filed March 16, 1925. Serial No. 15,878.

To all whom it may concern:

Be it known that I, JAMES E. 1L- LOUGHBY, a citizen of the UnitedStates, residing at Kellogg, in Shoshone County 5 and State of Idaho,have invented certain new and useful Improvements in Draft Fans, ofwhich the following is a specification.

,My present invention relates to improvements in draft fans adaptedespecially for use in the ventilation of buildings, as dwell ings. Thefan is designed for use in connection with a smoke flue or pipe from aheating stove, furnace, or other appliance, and is actuated by means ofpassing currents of smoke, gas or air from the fire, to drive aventilating fan located exterior of the smoke fine. The ventilating fanis arranged in position to create a circulation of air in the roomthrough which the smoke flue passes, by driving from the smoke flue theair warmed or heated by radiation from the smoke flue and thus inducingflow of currents of air to and from the smoke flue to be heated from theexterior thereof.

In carrying out my invention I utilize means within the smoke fine fordirecting or guiding the upwardly flowing currents of air or gases tothe motor fans within the smoke flue to insure greatest efliciency forthe motor fans and yet provide ample space for the unim eded movement ofthe draft from the fire.- Iea-ns are also provided for journaling themotor spindle in such manner that wear of parts may readily becompensated for and the rotating spindle provided with bearings forminga minimum frictional resistance to the operation of the device bynatural draft.

The invention consists in certain novel combinations and arrangements'ofparts as will hereinafter be more fully set forth and claimed.

In the accompanying drawings I have illustrated one complete example ofthe hysical embodiment of my invention where 1n the parts are combinedand arranged in accordance with the best mode I have thus far devisedfor the practical application of the principles of my invention.

Figure 1 is a View in elevation showing the appliance of my inventionoperatively located in a section of a smoke flue.

Figure 2 is a vertical sectional view at right angles to that of Figure1, on line 22 of Figure 1.

Figure 3 is an enlarged detail view of the spindle with its bearings insection.

In the preferred form of my intention I utilize a section of a smokepipe 1, adapted to receive and convey smoke or gases and air from aheating or other type of stove or furnace. which flue it will beunderstood is heated from the interior by hot gases of combustion andradiates heat from its exterior to the room or space in which the flueis located;

I'Vithin the cylindrical flue I arrange a vertical or longitudinallyextending shield preferably made up of sheet metal fashioned to propershape and secured as by rivets at the top and bottom ends to the smokeflue. This shield is fashioned with a pair of parallel concavedeflecting faces 2 and 3 which extend upwardly and curve laterally fromone side of the smoke flue toward its longitudinal or vertical center asseen in Figure 2.

At their upper ends these deflecting faces terminate in reversely curvedconcave faces 1 and 5 which return to the wall of the smoke flue in linewith the fixed bottom end of the shield.

As an auxiliary means for providing an unobstructed or unimpeded flow ofthe gases of combustion from the furnace through the smoke flue, theshield is slotted as at G to afford a space, in addition to the spacesat the edges of the shield, for upward draft through the flue.

lVithin the smoke flue and arranged transversely thereof are a pair ofspaced motor fans 7 and 8, each alined with a deflecting face 2 and 3,and fixed by set screws or bolts 9 on the spindle 10.

The spindle is journaled transversely of the smoke flue and passestherethrough with bearings at its ends, which ends are fashioned withcone journals 11 and 12, the former being engaged within a shield sleeve13, against a fixed bearing block 14. The bearing block is supportedexterior of the smoke flue and a suitable distance therefrom on thebracket 15 which is afiixed for support on the exterior of the smokeflue.

The cone journal 12 has a bearing against a resiliently supportedbearing block 16 which is encased Within a hollow bearing sleeve 17attached by its flanges 18 and bolts 19 to the smoke fine. A shieldsleeve 20 integral with the bearing sleeve 17 projects within the smokeline and over the end 12 ot the spindle as a shield therefor.

By means of a spring 21 located in the fixed bearing sleeve 17 andinterposed between the adjustable bearingblock 16 and an adjustingliolt22 in the open end or the bearing: sleeve 1?, the hearing block 16 isurged into close bearing: contact with the cone journal lit to supportthe spindlev By this arrangement oi parts a minimum frictionalresistance is obtained between the cone journais and their bearings forthe rotary spincle. and the resiliently supported bearing; block 16 mabe adjusted as required to take up wear and regulate the frictionalresiszance.

On the spindle exterior of the and located between gasl-rct '23 ot theflue and the bearing hlock l-l, is an in'ipelier tan 2:: secured on thespindle in adjusted posi tion by means of a set screw in the hub ot' thetan.

The impeller tan is located adjacent to the smoke due and is revolved orrotated from the motor tans through the spindle as the gases ofcombustion pass upwardly through the smoke "flue and are directed by thedeflectors to the motor tans.

it will he appa eat that as the heat is radiated troin the exterior otthe smoke flue the impeller tan will drive the warm air from the flue,thus causing a circulation of air in the room. the air flowing incurrents by induction to the tan and being impelled therefrom by theaction of the tan tor ventilation of the room.

smoke jtlue Having thus fully deszribed my invention, what I claim asnew and desire to secure by Letters Patent is:

l. The combination with a smoke flue having a slotted shield thereinforming a. pair 0t deflector plates for updraft through the line, of aspindle supported transversely of the smoke flue and having an exteriorimpeller tan thereon, and a pair of "fans within the line alined withthe detiector plates for operating the impeller tan.

2. The combination with a smoke line having a shield with a centrallongitudinal slot therein forming a pair of concave detiector'platesextending laterally from the inner wall ot the flue and terminating inreversely curved concave faces Oi a spin-die supported transversely. olthe smoke flue and an exterior impeller tan thereon, and a pair of tanswithin the line alined with said detiector plates for operating; theimpeller tan.

3. The eonihination with a conduit adapted for the passage of heatedgases therethrougln of a hracket supported on said conduit externi-illythereot', a bearing rigidly carried in said bracket, a spring: pres e-dhearing disposec; through a wall. of said conduit at a pointdiametrically opposite the first named hearing, a spindle rotatablymounted in said. hearings and cit-ending through and beyond said conc-tit impeller blades rigidly secured to said spini'lle internall o' saidconduit, means in said conduit for directing the heated gases againstsaid blades tor rotating: said spindles, and a driven meliher carried bysaid spindle erterna l of the conduit.

In testimony whereof I alli my signature.

JAIilES l3. 'WILLOTTGEIBY.

